Current-limiting signal generating circuit and uninterrupted power supply system
A signal generation circuit and current limiting technology, which is applied to emergency protection circuit devices, circuit devices, battery circuit devices, etc. for limiting overcurrent/overvoltage, can solve problems such as unfavorable equipment maintenance, and achieve easy maintenance and improved safety performance effect
Active Publication Date: 2014-04-23
HUAWEI DIGITAL POWER TECH CO LTD
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[0006] However, the disadvantage of the prior art is that multiple modules are integrated on the same board, and when a module fails, the entire board needs to be replaced, which is not conducive to equipment maintenance
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[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0054] The embodiment of the present invention provides a current-limiting signal generating circuit and an uninterruptible power supply system, which can simultaneously limit the current of multiple interleaved and parallel modules, thereby improving the safety performance of the system and facilitating equipment maintenance.
[0055] The system described in the embodiment of the present invention includes: at least two rectification modules, at least two inverter mo...
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The embodiment of the invention discloses a current-limiting signal generating circuit used for an uninterrupted power supply system. The uninterrupted power supply system comprises at least two rectification modules which are in phase interleaved and parallel connection and at least two inversion modules which are in phase interleaved and parallel connection, wherein each module comprises a sampling unit used for sampling the working current of the module to which the sampling unit belongs, and sending a current-limiting signal to the current-limiting signal generating circuit when the working current of the module to which the sampling unit belongs exceeds a preset threshold value; the current-limiting signal is sent to a CPU (Central Processing Unit) of the module to which each sampling unit belongs after being processed by the current-limiting signal generating circuit; the current-limiting signal is transferred to the current-limiting signal generating circuit corresponding to the module which is in phase interleaved and parallel connection with the module to which each sampling unit belongs; after receiving the current-limiting signal, the CPU is used for performing a current-limiting operation on the module to which each sampling unit belongs. The embodiment of the invention also provides the uninterrupted power supply system. By adopting the current-limiting signal generating circuit and the uninterrupted power supply system which are provided by the embodiment of the invention, simultaneous current limiting for multiple interleaved and parallel modules can be realized, so that the safety performance of the system is improved, and the equipment maintenance is convenient.
Description
technical field [0001] The invention relates to the technical field of uninterruptible power supply, in particular to a current-limiting signal generating circuit and an uninterruptible power supply system. Background technique [0002] UPS (Uninterruptible Power System, uninterruptible power supply) is a constant voltage and constant frequency uninterruptible power supply with energy storage device and inverter as the main component. UPS is mainly used to provide uninterrupted power supply to a single computer, computer network system or other power electronic equipment. [0003] In an existing UPS system, generally, multiple rectification modules, multiple inverter modules and one battery module may be included. Wherein, multiple rectifier modules are connected in phase interleaving and parallel, and multiple inverter modules are connected in phase interleaving and parallel. The phase staggered parallel connection means that the phases of the control signals respectively...
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IPC IPC(8): H02H9/02H02J7/00
Inventor 蒋正东
Owner HUAWEI DIGITAL POWER TECH CO LTD